Malicious PDF — malware analysis report

Static analysis result for SHA-256 38abfa1f90b4c5ec…

MALICIOUS

PDF

48.4 KB Created: 2021-06-04 00:32:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff2deac2c71293feca4d7bd72e3e2db4 SHA-1: 5119223623fe682618a9add9f4ae7d42e19666bd SHA-256: 38abfa1f90b4c5ec7edce987cc0da9cbf50503f0ced8caffece0887a236ba77a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to malicious infrastructure, specifically the URL https://netcdn.online/app/406889139/free-spins-coin-master-legit-game-hack, which is flagged as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/free-spins-coin-master-legit-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/pubg-uc-website_GM1330123889.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F5 27156 bytes
SHA-256: 4bd0efa76e8f679ed2c50bd7675c15a04f8192bbe34871d727c1039d97a993a3
font_01_sfnt_off00009131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9131 2812 bytes
SHA-256: 869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d
font_02_sfnt_off00009ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD0 18176 bytes
SHA-256: 4f85ccc1da016ecef161eb9f79bccb20543dd347b05e2325783b5ea44e0630af

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